My car hard to / won’t start when hot outside !!

[Shafi]

Hi All,

I have this weird phenomena recently. When I start my car in the morning while cold outside, it starts right away really good in a touch, but after the car was setting in the sun all day after work and it’s hot, the car has trouble starting!
I can hear the fuel pump working when turning the switch on.
It takes it 2-3 and sometimes more tries to start. I also noticed that when giving it a little throttle while starting (when hot) it helps a bit.
What could be the problem? is it not getting enough fuel or air when hot?
Could it be a bad Air pressure / Air temperature / Throttle Reheating sensor?
It is a 1997 Peugeot 106 GTI 16V. Here’s a detail of the intake / throttle:

Thanks

Topic

[Walter Cheryba]

OK, next idea is to find the line that goes from the canister to the engine. Disconnect that line from the engine and plug that port, I’d leave the canister hose open to atmosphere but direct it away from the engine. Observe what happens over several days. You may get a check engine light as a result of this. If the problem goes away then there is something amiss with the purge control system for the evaporative emissions. Try to find some factory service manual diagrams/process of operation information for it.

[Sergy]

Hi! Have you ever figured out what caused this issue? My 2002 Mercedes C230 has exactly the same problem.

[Author]

Replies